5. The terms of office of the members of the board of directors referred to in subparagraphs 1 to 3 of the first paragraph of section 4 shall not exceed three years, the terms of the members referred to in subparagraphs 5 to 8 of that paragraph shall not exceed two years, and the terms of the members referred to in subparagraph 9 of that paragraph shall be of one year.
The terms of office of the members referred to in subparagraphs 1 to 3 and subparagraph 9 of the first paragraph of section 4 may not be renewed more than once. The terms of office of the members referred to in subparagraphs 5 to 8 of that paragraph may be renewed twice.
Any vacancy in a position held by a student occurring during his term of office shall be filled for the unexpired portion of the term.